Regex multiple catch-all setup in postfix

Question

I need to setup a regex catch-all function on postfix such that:

tom.(anything)@domain.com goes to [email protected]
phil.(anything)@domain.com goes to [email protected]

How can this be achieved in postfix?

Flimzy · Accepted Answer · 2011-11-04T05:35:08.880

18

Add this to your main.cf:

alias_maps = regexp:/etc/postfix/aliases

Then create /etc/postfix/aliases as follows:

/^tom\..*@domain.com$/     [email protected]
/^phil\..*@domain.com$/    [email protected]

See the regexp table documentation for additional information.

edited Nov 04 '11 at 05:35

answered Nov 03 '11 at 11:37

Flimzy

4,374
21
41

I setup as suggested. getting bounce as: (Action: failed, Status: 5.1.1, Diagnostic-Code: x-unix; user unknown). I checked postconf -m and saw regexp supported but still not working. bounce complain [email protected] is not a real mailbox, but thats the point of alias. it should relay mail to [email protected] which is elsewhere without complaining. (I use postfix with working mailman lists on ubuntu if that helps) – thevikas Nov 04 '11 at 05:04
You may need to configure virtual aliases, etc if domain.com is a virtual alias. – Flimzy Nov 04 '11 at 05:35
3

thanks! called it virtual_alias_maps = regexp:/etc/postfix/aliases and got it running. – thevikas Nov 04 '11 at 06:59
Is it possible to use those kind of regexp in an LDAP setup? – Dolanor Feb 22 '18 at 15:19

score 4 · Answer 2 · answered Jan 03 '17 at 20:10

4

I'll add this for people who are wondering if it is possible to handle multiple address aliases with less configuration:

/^(.*)\..*@domain.com$/     [email protected]

This will forward:

<anything>.<part_b>@domain.com

to

<anything>@other.com

answered Jan 03 '17 at 20:10

L422Y

162
7

What is part_b? – Tigerware Jun 30 '21 at 22:57

score -1 · Answer 3 · edited Nov 03 '11 at 11:47

I don't know Postfix, but the regex you're looking for is:

/^.*(\..*)@(domain).com$/

Then you substitute the first matching group with nothing (empty string), and the second group with "other".

As an example, in Perl you would do:

my $regex = '^.*(\..*)@(domain).com$';

$your_string =~ /$regex/;
$aux = $2;
$your_string =~ s/$1//;
$your_string =~ s/$aux/other/;

print $your_string;

Of course this works only if email address has "domain" as domain. If you want domain to be anything, then the regex would be:

^.*(\..*)@(.*).com$

Regex multiple catch-all setup in postfix

3 Answers3